168 results about "Lead carbonate" patented technology

The invention discloses a waste lead recovering method for lead-acid storage batteries. The method comprises the following steps: fine stuff such as diachylon and the like are added in a reaction kettle with a stirring device; reducing agent (FeSO4) and dilute sulfuric acid are simultaneously added; stirring reaction is carried out at the temperature of 50-60 DEG C for 50-70 minutes so as to reduce lead dioxide into lead sulfate; the lead sulfate is added into the reaction kettle with the stirring device; water is simultaneously added into the reaction kettle for size mixing; then sodium carbonate is added; desulfuration is carried out at the temperature of 50-60 DEG C so as to obtain solid lead carbonate; the lead carbonate is put into a smelting furnace and then decomposed at the temperature of 320-350 DEG C so as to obtain lead oxide; and reducing agent (carbon) is added into the smelting furnace to reduce the lead oxide into metal lead at the temperature of 700-800 DEG C. The method recovers the lead by means of the combination of the wet and the dry processes, thereby avoiding the harm to the environment caused by lead dust, lead vapor, lead skim, sulfur dioxide gas, and the like by adopting fire smelting. The method has the advantages of high lead recovery rate, low energy consumption and no environment pollution.

A carbon oxide sensor having high sensitivity capable of reduction of influence of humidity is provided. A detection electrode and a counter electrode are provided on one side of an electrolyte, respectively. The detection electrode contains a metal oxide and a metal carbonate including plural components. The metal carbonate preferably contains a first component of alkali metal carbonate and a second component of at least one element selected from the group consisting of alkali earth metal carbonate, transition metal carbonate, zinc carbonate, cadmium carbonate, indium carbonate, lead carbonate and bismuth carbonate. Specifically, it is preferable to contain the first component including Li2CO3 and the second component including at least one element selected from the group consisting of BaCO3, CaCO3 and SrCO3.

The invention discloses a method of recovering sodium sulfate from a lead-bearing desulfurized waste liquid. The method is characterized by comprising the following steps: after adding a complexing agent into the lead plaster-bearing desulfurized waste liquid, forming a lead carbonate precipitate of lead complex ions in the liquor by adopting carbon dioxide or sodium hydrogen carbonate, and then carrying out solid-liquid separation to obtain a sodium sulfate filtrate and the lead carbonate precipitate; adding anhydrous sodium sulfate and sodium hydroxide into the sodium sulfate filtrate obtained by separating lead carbonate, and cooling at low temperature to separate out sodium sulfate crystals; and returning the filtrate without the sodium sulfate crystals again for desulfurization of lead oxide-bearing wastes.

The invention discloses ultrafine lead oxide prepared from desulfurated lead plaster by means of three-stage process and a method for preparing the ultrafine lead oxide. The method comprises the following steps of: carrying out a desulfurization and lead plaster acid leaching process by causing the desulfurated lead plaster to react with acid, simultaneously adding a reducing agent, and carrying out solid-liquid separation after the reaction is ended to obtain a plumbic acid containing solution; carrying out a lead carbonate preparation process by causing the plumbic acid containing solution to react with sodium carbonate, carrying out solid-liquid separation, washing and drying to obtain the lead carbonate; carrying out a roasting process by preparing the ultrafine lead carbonate by roasting the lead carbonate, wherein the ultrafine lead oxide can be PbO, Pb3O4, or the mixture of the PbO and the Pb3O4, the mean particle granularity of the ultrafine lead oxide is less than 2 mu m, and the nanocrystalline grain size is less than 500nm. Compared with the prior art, the preparation method of the ultrafine lead oxide disclosed by the invention has the following beneficial effects: the active material of the ultrafine lead oxide powder compound for the production of a storage battery enterprise can be directly prepared, lead volatilize quantity is small, the ash rate is low, the direct lead yield is high, the energy consumption is low, pollutants of sulfur dioxide and the like are not generated, and the like.

The invention relates to the technical field of clean recycling of waste batteries and discloses a method for recycling lead oxide from lead plaster of a waste lead-acid storage battery. The method comprises the following steps that (1) pre-desalination is conducted, specifically, the lead plaster of the waste lead-acid storage battery is added with alkali liquor to be subjected to pre-desalination, so that lead acid, lead acetate, lead nitrate, lead perchlorate or lead carbonate in the lead plaster is removed; (2) dissolution is conducted, specifically, a complexing agent solution is added into the lead plaster subjected to pre-desalination, all PbO in the lead plaster reacts with a complexing agent to generate lead complex ions, and a lead-bearing solution and filter residues are obtained; (3) dissociation is conducted, specifically, the pH value of the lead-bearing solution is adjusted by adding a dissociation agent solution, so that the lead complex ions are dissociated, and the PbO and a mixed solution containing the complexing agent and a dissociation agent are obtained; and (4) separating is conducted, specifically, a lead oxide product is obtained after solid-liquid separation and washing. According to the method, the technological condition is mild, the technological process is environmentally friendly, the technological procedure is simple, energy consumption is small, the cost is low, the lead oxide recycling rate is high, the purity is high, and the method has very high industrial application value.

The invention provides a comprehensive recycling method of electric steel making lead and zinc-contained dust. The comprehensive recycling method comprises the following steps: lead and zinc-contained dust is prepared as pellets for reduction roasting at high temperature; lead and zinc are reduced as simple substances for volatilization in a gas-state form; iron-contained materials are formed to molten blocks, and are separated from lead and zinc; lead and zinc-contained gas and dust are collected, and are oxidized and cooled to obtain rough oxidized lead powder and rough oxidized zinc powder; the iron-contained materials without lead and zinc are collected for quick cooling, crushing and magnetic separation to obtain iron raw materials; the rough oxidized lead powder and the rough oxidized zinc powder are put in a rotary kiln again for high-temperature sintering, and are oxidized and cooled to obtain high-purity finish oxidized lead powder and finish oxidized zinc powder; the finish oxidized lead powder and the finish oxidized zinc powder are firstly reacted with hydrochloric acid to obtain lead chloride and zinc chloride; and lead chloride and zinc chloride are reacted with sodium carbonate to finally obtain lead carbonate and zinc carbonate. The comprehensive recycling method is simple in process, high in lead and zinc recovery rate and high overall resource recycling rate.

Disclosed is violet pearlescent anti-forgery phototropic printing ink, containing anti-forgery dye violet pearl luster, printing ink vehicle, filler, flatting agent, wetting agent, foam killer and solvent. The violet pearlescent anti-forgery ink is characterized in that the weight percentages of the ingredients are as follow: 5-30g green-turn-violet anti-forgery printing ink, 20-40g printing ink vehicle acrylics, 5-20g filler lead carbonate, 0.3-3g flatting agent, 0.3-3g wetting agent, 0.5-3g foam killer, and 40-60g solvent n-propyl. The invention is characterized in that: 1, the phototropic printing ink is hard to forge and is high in fidelity, thus improving actual anti-forgery value; 2,the violet pearlescent phototropic oil, added with violet lead carbonate, supplements the color system of changing from blue to violet, which conventional printing ink fails to realize; 3, the violet pearlescent phototropic oil, added with violet lead carbonate, is enlarged in granule and increased in solid content; on the basis of the same consumption, more printings can be produced, thus improving output and improving the texture of the printings.

A kind of desulfitation transformation method to regenerate Pb with waste chloride accumulator, it contains a procedure to break waste chloride accumulator, the liquid and the solid in the Pb mud fluid after breaking will be separated, and wet lead slime can be gained. The wet lead slime will be put into a desulfurizer. And sodium carbonate will be also added as desulfurating agent, then they will be fully agitated, they will fully react. The liquid and solid will be separated after stewing, The sediment lead carbonate and liquid sodium sulfate can be gained, the later will be put into a reactor, and barium carbonate will also be put in, then they will be agitated, and reacted fully, they will be stew, and then the liquid and solid of them will be separated, the sediment barium sulfate and liquid sodium carbonate can be gained, and the later will be delivered into the desulfurizer to recycle as desulfurating agent. This patent translates the reaction between sodium sulfate and barium carbonate in the remained liquid, recycle the desulfurater sodium carbonate. It not only resolves the problem how to deal with the sodium sulfate in the desulfitation transformation technology, but also resolves the regeneration and the recycle of desulfurater sodium carbonate.

The invention discloses a hydrolysis-resistant cable material for an automobile and a preparation method of the hydrolysis-resistant cable material. The hydrolysis-resistant cable material is prepared from the following raw materials, by weight part: 45-60 of ethylene propylene diene monomer rubber, 22-34 of tetrafluoroethylene-propylene rubber, 9-14 of rectorite powder, 5-10 of C5 hydrogenated petroleum resin, 2-3 of tert-butyl-hydroperoxide, 1.5-2.5 of basic lead carbonate, 3-5 of polyparadinitrosobenzene, 4-8 of dibutyl sebacate, 2-3 of magnesium oxide, 1-2 of zinc stearate, 3-6 of disproportionated rosin, 2.5-4.5 of N-ethyl-p-toluenesulfonamide, 12-17 of a composite flame retardant agent, 5-10 of spherical silicon powder, 1-2 of an accelerant PPD, 1-2 of an accelerant ZBPD, and 1-2 of an antioxidant 2246. The prepared cable material has excellent hydrolysis resistance, so that the electric wires and cables of the automobile can be effectively prevented against hydrolysis. The cable material can maintain excellent properties after continuously used in high pressure and high temperature, and has good electrical insulation property, mechanical strength, corrosion resistance, abrasive resistance, and thermal resistance.

The invention relates to a desulfurization process for a waste material containing lead sulfate and a circulation method of desulfurization mother liquor thereof, belonging to the technical field of comprehensive utilization of solid waste materials containing lead. The desulfurization process comprises the steps: dissolving the waste material containing the lead sulfate with a compound leaching agent, thus dissolving lead sulfate solid, and obtaining filter liquor dissolved with the lead sulfate and unreacted filter residues after solid-liquid separation, wherein the compound leaching agent comprises an A and B conjugate solution, A is one or more of ammonia and amine substances, and b is ammonium salt; adding a carburizing agent providing carbonate into the lead sulfate filter liquor, and obtaining lead carbonate precipitation and deleading mother liquor after solid-liquid separation; adding a desulfurizing agent into the deleading mother liquor, and obtaining sulfate and the desulfurization mother liquor after solid-liquid separation. The desulfurization process industriously achieves the requirement of atom economy reaction.

A process for preparing lead trihydroxy sulfate from the lead mud of used lead accumulator includes such steps as reaction between said lead mud and sodium carbonate, desulfurizing to obtain lead carbonate, filtering, decoloring the filtrate, evaporating, crystallizing to obtain sodium sulfate as by-product, dissolving the filtered dregs in nitric acid, reacting on sulfuric acid to obtain the deposit of pure lead sulfate, reacting on sodium hydroxide to obtain lead trihydroxy sulfate, filtering, drying and pulverizing.

The invention relates to a novel technology for colouring on glaze during ceramic painting. The novel technology for colouring on glaze during ceramic painting comprises the following steps: adopting a 18# white material, namely selecting 50% by weight of feldspar glaze, 10% by weight of quartz powder, 20% by weight of boric acid and 20% by weight of lead carbonate, mixing and placing the mixture into a ceramic crucible, melting to be bright and transparent at the temperature of 1300 DEG C, cooling into a glass fusion cake, smashing and grinding for late use; by adopting a guide pipe metal pen as a colouring tool, mixing the prepared white material with camphor oil equivalent to 60% by weight of the weight of the white material, grinding manually, then sequentially adding 20% by weight of pine distillate oil and 20% by weight of frankincense oil, and grinding into liquid paste; colouring and roasting, namely painting various glazes, colouring and roasting at the temperature of 790-820 DEG C. The novel technology for colouring on glaze during ceramic painting has the beneficial effects that high-grade ceramic or present ceramic can be prepared; the 18# white material has the advantages of high brightness, no cracking and no strict requirement on roasting atmosphere; uniform and regular lines, easy control and high production rate can be guaranteed; thickness of lines can be graded.

The invention discloses a reflecting film of a three-layer structure. The surface layers on the two sides are graft-modified polymers, and the core layer is the mixture of aliphatic polyester and inorganic particles. The graft-modified polymers are graft-modified polycarbonate or polyacrylic acid or polyethylene vinyl acetate or polystyrene or polypropylene or polyethylene; graft-modified perssad is acrylic acid or acrylonitrile or glycidyl ester or maleic anhydride; the aliphatic polyester is polylactic acid or polycaprolactone or poly hydroxy alkyl acid esters; the inorganic particles are one or two or more of calcium carbonate, titanium dioxide, zirconium oxide, zinc oxide, zinc sulfide, lead carbonate and barium sulfate. The graft-modified polymers on the surface layers play a supporting role, the film is prevented from being cracked and folded, the aliphatic polyester is prevented from absorbing water and being degraded due to the high water vapor barrier property, and the film reflecting performance is stable.

The present invention relates to the perparation process of lead-acid accumulator negative pole with lead carbaonate as material. It includes the following steps: grinding and sieving lead carbonate; imxing with additives and reaction with sulfuric acid to produce lead paste; painting the lead paste to Pb-Sb or Pb-Ca alloy slab lattice; setting the slab lattice into sodium sulfate and/or sulfuric acid solution for constant current compounding to obtain the negative pole board. Compared with traditional preparation process, the present invention has less steps, lower power consumption, high material utilizatino and thus lower production cost. The production process may be combined with the recovery of waste lead-acid accumulator to reuse material and reduce pollution.

The invention discloses a cleaning briquette coal binder. The binder comprises the following raw materials: 0.13-0.30% of lead carbonate, 0.20-0.40% of magnesium chloride, 0.20-0.40% of calcium oxide, 0.20-0.40% of an oxidizing agent, 77.0-87.0% of a crosslinking agent, 0.15%-0.25% of sodium hydroxide, 0.30-0.60% of a tackifier, 0.15%-0.25% of magnesium sulfate, 1.50-2.50% of sodium humate, 0.20-0.30% of a smoke suppressant and 8.00-12.0% of kaolin. The briquette coal binder disclosed by the invention has the effects of suppressing smoke, preventing moisture, reducing dust, fixing sulfur, inhibiting nitrogen and the like, and is developed in line with the national situation of energy conservation, emission reduction and haze treatment according to China coal energy actual application and the characteristics of the haze formation cause in recent years; the binder has prominent energy conservation and emission reduction effects and an oxidative combustion-promoting effect; and since the binder is fully burnt, the energy conservation effect is achieved.

The invention relates to the technical field of battery recycling equipment, in particular to a recycling process of waste battery lead. The recycling process is completed according to the following steps that a lead storage battery is mechanically cut off and broken and then is washed and screened at the same time by a rotary screen washing machine through an alkaline solution, plastic, waste electrolytes and lead bullion are screened out, and the waste electrolytes are conveyed to an ultrafiltration membrane processing system to be processed; lead carbonate is subjected to electromagnetic induction heating, sufficient oxygen is led in, the electromagnetic induction frequency ranges from 8 KHz to 60 KHz, the control temperature ranges from 330 DEG C to 460 DEG C, heat preservation is performed for 5 h to 6 h, and completely-oxidized lead tetroxide will be obtained; and in the electrolysis period, an electromagnetic induction magnetic field is applied at the bottom of an electrolytic tank, the magnetic induction intensity is 800 mT, and national standard number 1 lead is obtained. The recycling process has the beneficial effects that refining of the lead is achieved through a method that electrolysis is used in cooperation with electromagnetism, the purity of the lead is greatly improved, and repeated recycling of precious metal is also achieved; and the recycling process is simple, machining is easy, the recycling process is suitable for large-scale recycling, and therefore the recycling cost is reduced.

The invention provides a method for detecting hydrogen sulfide (H2S), carbon dioxide (CO2) and hydrogen cyanide (HCN) in acid gas. The method comprises the following steps: combining a mixing solution of potassium hydroxide and a phenolphthalein indicator which are contained in different flasks in a volumetric flask; and adding pure water until reaching the scale, wherein potassium carbonate is generated by the CO2 adsorbed by the potassium hydroxide and reacts with calcium chloride to generate a calcium carbonate precipitation; the calcium carbonate precipitation is dissolved and titrated by using hydrochloric acid and a sodium hydroxide solution respectively, so that the content of the CO2 is obtained. The H2S adsorbed by the potassium hydroxide can generate potassium sulphide which reacts with a zinc acetate solution, so that a flocculent yellow precipitation is generated; an excess amount of standard iodine solution is added under the acid condition; the back titration is performed by using sodium thiosulfate; the content of the H2S is computed after blanking. After the HCN is adsorbed by potassium hydroxide, lead carbonate solid powder and a rhodanine indicator are added; the content of the HCN is computed after blanking. The method is rapid in detection speed and strong in operability; the precision and accuracy of the method can completely meet the requirement of a coking desulfurization and dehydrogenation process. Thus, the accurate detection data for the coking desulfurization and dehydrogenation process is provided.

The invention discloses a waste lead-acid storage battery spent acid recycling method. Most impurities in spent acid solution are filtered by a physical filtering method, colloidal substances and large-particle suspended matters are removed by a flocculant mode, ultrafine barium sulfate particle suspended matters and lignosulfonate remain, lignin and lead carbonate ultrafiltration lead sulfate particles are decomposed by an electrolytic process, and sulfuric acid electrolyte can be recycled again. Recycled sulfuric acid is treated by the process, the impurities in the electrolyte can be screened and removed step by step, filtering efficiency is improved, expanding agents such as barium sulfate and lignosulfonate in the electrolyte are completely removed, and the influence of entering of the impurities in positive active materials on the cycle life of a battery is avoided.

The invention discloses a method for refining lead and zinc from coarse zinc oxide recycled from steelmaking dust and belongs to the technical field of metal recycle. The method comprises the following steps that (1) the coarse zinc oxide is made into spherical particles, and the spherical particles are added into an oxidizing smelting furnace to be heated, oxidized and refined; (2) zinc and lead elements volatilize out of a furnace body in a gaseous form and become dust after meeting oxygen, and the dust containing the zinc and lead is collected through a container; (3) the dust is put into a hydrochloric acid solution to be stirred and dissolved, the zinc component exists in a zinc ion solution form, and the lead component exists in a lead chloride solid form; (4) a sodium carbonate solution is added into the zinc ion solution, zinc carbonate is generated, a sodium carbonate solution is added into the lead chloride, and lead carbonate is generated; and (5) washing and drying are conducted. According to the method, the process is simple, operation is convenient, the purity of PbCO3 and ZnCO3 which are finally obtained can reach 98% or above, the purity of PbO and ZnO reaches 99% or above, and the elementary substances Zn and Pb reach 99.9% or above.